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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var num = 678;
        var ge = num % 10;
        // var shi = parseInt((num % 100)/10);
        var shi = parseInt(num / 10) % 10;
        var bai = parseInt(num / 100);
        console.log('ge: ', ge);
        console.log('shi: ', shi);
        console.log('bai: ', bai);
    </script>
</body>
</html>